If you are past other books on Textual Criticism, then maybe its time for this set.
This is only Volume 1, though Volume 2 is available here:
There are other relevant books on this topic, such as
Revision Revised by Burgon http://www.archive.org/details/revisionrevisedt00burg
Traditional Text of the New Testament http://www.archive.org/details/traditionaltexto00burgrich
Causes of Corruption of the New Testament Text http://www.archive.org/details/causesofcorrupti00burgiala
or Which Version http://www.archive.org/details/WhichVersionByPhilipMauro
of even the work of Riplinger (Gail), Available on Video for download at:
Questions and Answers http://www.archive.org/details/Questions_and_Answers_Riplinger
Translators and Translations http://www.archive.org/details/Translators_and_Translations_Riplinger
The work Codex B and Its Allies is designed as a comparative study between versions of the New Testament that use Vaticanus and Sinaiticus and those that do not.
IT also includes material on the work of Von Soden (that is his real name), who is the author for the primary text on which the NKJV is based, (which also seems to have many of the same roots as the W H texts, based on the documentation).
The Texts (TR) which are not based on Vaticanus can also be found here.